21379968008

素因数分解:

$2^3\times 7^1\times {\mathrm{83}}^1\times {\mathrm{223}}^1\times {\mathrm{20627}}^1$

素因数の和:20946

約数の個数: 64

約数和(自身を含む): 46576373760

約数和(自身を除く): 25196405752

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 83, 166, 223, 332, 446, 581, 664, 892, 1162, 1561, 1784, 2324, 3122, 4648, 6244, 12488, 18509, 20627, 37018, 41254, 74036, 82508, 129563, 144389, 148072, 165016, 259126, 288778, 518252, 577556, 1036504, 1155112, 1712041, 3424082, 4599821, 6848164, 9199642, 11984287, 13696328, 18399284, 23968574, 32198747, 36798568, 47937148, 64397494, 95874296, 128794988, 257589976, 381785143, 763570286, 1527140572, 2672496001, 3054281144, 5344992002, 10689984004, 21379968008]

約数ペア:

[(1, 21379968008), (2, 10689984004), (4, 5344992002), (7, 3054281144), (8, 2672496001), (14, 1527140572), (28, 763570286), (56, 381785143), (83, 257589976), (166, 128794988), (223, 95874296), (332, 64397494), (446, 47937148), (581, 36798568), (664, 32198747), (892, 23968574), (1162, 18399284), (1561, 13696328), (1784, 11984287), (2324, 9199642), (3122, 6848164), (4648, 4599821), (6244, 3424082), (12488, 1712041), (18509, 1155112), (20627, 1036504), (37018, 577556), (41254, 518252), (74036, 288778), (82508, 259126), (129563, 165016), (144389, 148072)]